﻿// Copyright 2004-2011 Castle Project - http://www.castleproject.org/
// 
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// 
//     http://www.apache.org/licenses/LICENSE-2.0
// 
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

namespace Castle.MicroKernel
{
	using Castle.Core;
	using Castle.MicroKernel.Context;

	/// <summary>
	///   Represents obtained just in time object.
	/// </summary>
	/// <typeparam name = "T"></typeparam>
	public interface IReference<out T>
	{
		/// <summary>
		///   If the reference introduces dependency on a component, should return <see cref = "DependencyModel" /> for that dependency, otherwise <c>null</c>.
		/// </summary>
		/// <param name = "component"></param>
		/// <returns></returns>
		void Attach(ComponentModel component);

		void Detach(ComponentModel component);

		/// <summary>
		///   Resolves object referenced by this reference, optionally using provided <paramref name = "kernel" />.
		///   If object is resolved from the kernel, the <paramref name = "context" /> should be used to guard
		///   against against cyclic dependencies.
		/// </summary>
		/// <param name = "kernel"></param>
		/// <param name = "context"></param>
		/// <returns></returns>
		T Resolve(IKernel kernel, CreationContext context);
	}
}